In a club election, the number contestants is one more than the number of maximum candidates for which a voter can vote.  If the total number of ways in which a voter can vote be 62 then the number of candidates is

Let the number of contestants be n

A voter can vote for 1,2, 3, ... n-1 candidates

Number of ways he can vote is

C₁ + C₂ + .. C_n-1 Where C_r  is number of ways of choosing r objects from a total of n..

This is equal to 62

2^n - 2 = 62

2^n = 64

n = 6